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base64解码编码c++的，我找了好久才找到的-decoding base64 encoding c, and I look for a long time to find the

简单的密码的例子，使用VB的源码, 非常简单明了，希望大家喜欢。-Simple Example of VB Source Code for Encrypt, Rudimentary encryption/decryption demo program

extract and hash strings in a C program.

一个周期3的多表代替密码，第1个表由密钥字法产生（密钥字自拟），第2个表由洗牌法产生（注意，字母a~z与数字0~25一一对应），第三个表由公式法产生（数学公式自拟，注意它须是Z26上的一个一一变换）(a cycle of three multi-table instead of passwords, a table by key word method, (key word from the intended), Table No. 2 produced by shuffling method (note, a letter with a number of z ~ 0 ~ 25 he gathers), 3rd tables generated by the formula (from the proposed mathematical formula, it should pay attention to the Z26 is a transformation on January 1))

AES算法主要包括三个方面：轮变化、轮数和密钥扩展。本文以128为例，介绍算法的基本原理；结合C语言，实现高级数据加密算法AES（AES-128）。-AES algorithm mainly includes three aspects: round of changes, round number and key expansion. In this paper, 128 for example, introduce the basic principles of algorithm combination of C language, the realization of advanced data encryption algorithm AES (AES-128).

RSA公钥加密程序RSA公钥加密程序RSA公钥加密程序RSA公钥加密程序RSA公钥加密程序(RSA public key encryption program)

这是RC4加密算法的VB源程序，语法简单。如果您有需要，可以翻译为其他语言的版本。-This is the RC4 encryption algorithm of the VB source code, a simple grammar. If you have needs, can be translated into other languages.

Internet上的PIK加密算法源程序-on the Internet PIK encryption algorithm source code

利用图片加密文件，不但难以被发现，还不容易被破解，是一种非常实用的加密方式。本程序使用使用了bmp图片来加密文件。(The use of encrypted image files, is not only difficult to be found, not easily cracked, encryption is a very practical way. This program uses the bmp image to use to encrypt files.)

修改本程序中的U盘的序列号后，程序可以变成你自己的独立的Ｕ盘启动密匙，　只能你的Ｕ盘才能打开程序　不需要往Ｕ盘中存入任何文件，就可实现用Ｕ盘加密程序.只能通过你的U盘启动你的程序 程序中有详细的注释(Encrypt your program by a soul U-disk without saving anything in you disk Modify the program, U-disk serial number, the program can become your own independent U disk key, only you can open U disk U disk does not need to deposit any file, can be achieved U disk encryption program)